The Many Moons of Saturn

NASA's Cassini probe flies by a Saturn moon.

Setting Your Sights on Saturn

Dark material splatters the walls and floors of craters in the surreal, frozen wastelands of Iapetus. This image shows terrain in the transition region between the moon's dark leading hemisphere and its bright trailing hemisphere. The view was acquired during Cassini's only close fly-by of the two-toned Saturn moon. (NASA/JPL/Space Science Institute)